diff --git a/go-backend/internal/constants/constants.go b/go-backend/internal/constants/constants.go
index 5ed923e..59fb5fa 100644
--- a/go-backend/internal/constants/constants.go
+++ b/go-backend/internal/constants/constants.go
@@ -77,12 +77,14 @@ var Priviliges = struct {
 }
 
 var Roles = struct {
+	Opponent  int8
 	Supporter int8
 	Member    int8
 	Viewer    int8
 	Editor    int8
 	Admin     int8
 }{
+	Opponent:  -5,
 	Supporter: 0,
 	Member:    1,
 	Viewer:    2,